The delivery of water pursuant to Section 2727 is subject to the following restrictions:
(a)
Until a mutual water company fills the water orders of its stockholders or members pursuant to its constitution, bylaws, or rules, it shall not deliver water to others.
(b)
The temporary service authorized by Section 2727 shall not continue for more than six months after the war need has ceased.
(c)
Before any temporary service of water is made a statement shall be filed with the commission
stating the private irrigation plant or mutual water company rendering the service, the party receiving it, the land irrigated, and the rate, if any, charged for the service.